Ok I have finally gotten around to playing with the #26 again. I have B+ of 306V, plate resistor value of 43K, plate voltage of 133v. I have 10.0v across my 2.5K cathode resistor. I have a cathode by pass of 1000mfd. I am using a 2.0V 5AH battery with a .47 dropping resistor to end with 1.5V. If I understand the tech sheet correctly I should be ballpark and it should be ok.
The main problem still seems to be some small hum that seems to lower in level when I touch the chassis. Any thoughts on how to totally kick the hum to the curb? Now, I have read about every article I could find on the 26 and the hum problems and I thought the hum might go away using the battery for the heater feed. Any thoughts/comments? Thanks for the help in advance.
Joe
The main problem still seems to be some small hum that seems to lower in level when I touch the chassis. Any thoughts on how to totally kick the hum to the curb? Now, I have read about every article I could find on the 26 and the hum problems and I thought the hum might go away using the battery for the heater feed. Any thoughts/comments? Thanks for the help in advance.
Joe
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.